I hope he's right about his shot getting better with practice, because I'm not sure I agree with him. When I watch him shoot, I see questionable mechanics that go beyond having hands the size of manhole covers. Having less-than-good mechanics puts a lower ceiling on how good he could be as a shooter. If he worked his shot out - not releasing from his ear, for starters - I think his jumpshot would be that much better in the long run.
That said, he's in the NBA, and I'm sitting in front of my computer. I can only criticize so much.